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Finding the Fourth Proportional to 5,878.57, 8,819.31 and 2,918.40

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Solution

The fourth proportional to 5,878.57, 8,819.31 and 2,918.40 is: 4,378.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,878.57 : 8,819.31 = 2,918.40 : x
  2. Step 2: Convert to fraction form
    5,878.57/8,819.31 = 2,918.40/x
  3. Step 3: Cross multiply
    5,878.57x = 8,819.31 × 2,918.40
  4. Step 4: Simplify right side
    5,878.57x = 25,738,274.30
  5. Step 5: Solve for x
    x = 25,738,274.30/5,878.57
  6. Step 6: Final answer
    x = 4,378.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.